83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/*
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* Copyright (C) 2010 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* machine/setjmp.h: machine dependent setjmp-related information.
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*/
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/* _JBLEN is the size of a jmp_buf in longs.
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* Do not modify this value or you will break the ABI !
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*
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* This value comes from the original OpenBSD ARM-specific header
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* that was replaced by this one.
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*/
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#define _JBLEN 64
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/* According to the ARM AAPCS document, we only need to save
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* the following registers:
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*
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* Core r4-r14
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*
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* VFP d8-d15 (see section 5.1.2.1)
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*
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* Registers s16-s31 (d8-d15, q4-q7) must be preserved across subroutine
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* calls; registers s0-s15 (d0-d7, q0-q3) do not need to be preserved
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* (and can be used for passing arguments or returning results in standard
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* procedure-call variants). Registers d16-d31 (q8-q15), if present, do
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* not need to be preserved.
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*
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* FPSCR saved because GLibc does saves it too.
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*
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*/
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/* The internal structure of a jmp_buf is totally private.
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* Current layout (may change in the future):
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*
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* word name description
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* 0 magic magic number
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* 1 sigmask signal mask (not used with _setjmp / _longjmp)
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* 2 float_base base of float registers (d8 to d15)
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* 18 float_state floating-point status and control register
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* 19 core_base base of core registers (r4 to r14)
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* 30 reserved reserved entries (room to grow)
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* 64
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*
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* NOTE: float_base must be at an even word index, since the
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* FP registers will be loaded/stored with instructions
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* that expect 8-byte alignment.
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*/
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#define _JB_MAGIC 0
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#define _JB_SIGMASK (_JB_MAGIC+1)
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#define _JB_FLOAT_BASE (_JB_SIGMASK+1)
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#define _JB_FLOAT_STATE (_JB_FLOAT_BASE + (15-8+1)*2)
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#define _JB_CORE_BASE (_JB_FLOAT_STATE+1)
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#define _JB_MAGIC__SETJMP 0x4278f500
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#define _JB_MAGIC_SETJMP 0x4278f501
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